Mercury-added in the cosmetics not only be regarded as a preservative, but also has the function of quick whitening. Since mercury is prohibited in cosmetics all over the world, no one has studied how much mercury is safe for the skin. Conservative estimates, if they want the effect of mercury is whitening, the minimum amount of mercury is at least about 0.05%, otherwise, it is difficult to have the effect. So we can see some unqualified cosmetics contains much mercury which exceeds the standard. In addition to eliminating inflammation and killing skin mites, mercury also can reduce the immunity of the skin so that it is no longer sensitive to external stimuli.
Thimerosal has a good bacteriostasis effect.
The addition of mercuric sulfide to lipstick and other cosmetics can make the color bright and durable.
Mercury chloride can be used in cosmetics to make the products white and delicate.
But mercury is very toxic, even a small amount of it can cause permanent leukoplakia or black spots, cause nervous system disorders, low immunity, kidney necrosis and body toxicity. It also has a cumulative effect.
So we remind everyone to stay away from beauty parlors which claim they can help you whiten quickly. The cosmetics with unknown sources or labels are also needed to be away!
Mercury can have a color reaction sensitively with neighboring carboxy phenyl diazoamino azobenzene to form a red complex. The color reaction is completed immediately at room temperature, and the complexes can be stabilized above 24h. This method not only has high selectivity but also has good precision and accuracy. It is in line with the requirements for mercury detection in cosmetics. It has been used in the analysis of actual samples and the results are satisfactory. Use UV-5200
to set wavelength to be 520nm, and then determine analysis wavelength by spectrophotometric